Coherence properties and quantum state transportation in an optical conveyor belt

Details Coherence properties and quantum state transportation in an optical conveyor belt Coherence properties and quantum state transportation in an optical conveyor belt

2003-04-11

arxiv.org/abs/quant-ph/0304081v1

Phys. Rev. Lett. 91, 213002 (2003)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.91.213002

We have prepared and detected quantum coherences with long dephasing times at the level of single trapped cesium atoms. Controlled transport by an "optical conveyor belt" over macroscopic distances preserves the atomic coherence with slight reduction of coherence time. The limiting dephasing effects are experimentally identified and are of technical rather than fundamental nature. We present an analytical model of the reversible and irreversible dephasing mechanisms. Coherent quantum bit operations along with quantum state transport open the route towards a "quantum shift register" of individual neutral atoms.

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